Solvation of UCl62− Anionic Complex by MeBu3N+, BuMe2Im+, and BuMeIm+ Cations

The complexes [MeBu3N](2)[UCl6] and [BuMe2IM](2)[UCl6] were characterized in the solid state and in solution of [MeBu3N][Tf2N], [BuMe(2)Im][Tf2N], and [BuMeIm][Tf2N] room-temperature ionic liquids using single-crystal XRD, EXAFS, electrochemistry, UV-visible absorption spectroscopy, and NMR. In the...

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Bibliographic Details
Published in:Inorganic chemistry 2008-07, Vol.47 (13), p.5746-5755
Main Authors: BOSSÉ, Emilie, DEN AUWER, Christophe, BERTHON, Claude, GUILBAUD, Philippe, GRIGORIEV, Mikhail S., NIKITENKO, Serguei, NAOUR, Claire Le, CANNES, Céline, MOISY, Philippe
Format: Article
Language:English
Subjects:
Chemical Physics
Physics
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Summary:The complexes [MeBu3N](2)[UCl6] and [BuMe2IM](2)[UCl6] were characterized in the solid state and in solution of [MeBu3N][Tf2N], [BuMe(2)Im][Tf2N], and [BuMeIm][Tf2N] room-temperature ionic liquids using single-crystal XRD, EXAFS, electrochemistry, UV-visible absorption spectroscopy, and NMR. In the solid state and in solution, the existence of hydrogen bonding between the UCl62- complex and the ionic liquid cations was revealed by these techniques. The MeBu3N+ cation interacts with UCl62- via the protons on the alpha-carbon atoms of nitrogen. The protons of the imidazolium ring account for the interaction between the BuMe2IM+ cation and the UCl62- anion. For the BuMeIm(+) cation the major interaction was confirmed between the most acidic proton on C(2) and the chlorides of UCl62-. The experimental results also show that the intensity of the interaction between the UCl62- anion and the cation varies with the ionic liquid cation in the following order: MeBu3N+ approximate to BuMe(2)Im(+)
ISSN:0020-1669
1520-510X
DOI:10.1021/ic702477z